Phellamurin

Phellamurin is a flavanone glycoside naturally occurring in Phellodendron amurense (Amur cork tree) bark, where it exists alongside berberine and other bioactive alkaloids. Its preliminary biological activity appears driven by its flavanone aglycone structure, which may modulate oxidative stress pathways and inflammatory signaling cascades in cell-based models.

Origin & History

Phellamurin is a natural flavonoid (prenylated dihydroflavonol) primarily extracted from plants in the genus Phellodendron, including P. amurense and P. chinense, as well as Commiphora africana. It is obtained through standard phytochemical extraction methods, yielding a solid compound with molecular formula C26H30O11 and limited water solubility.

Historical & Cultural Context

No historical or traditional medicinal uses are documented for phellamurin specifically. The compound is primarily noted as a phytochemical constituent of Phellodendron species without reference to traditional medicine systems.

Health Benefits

• Potential antioxidant activity (evidence: preliminary in vitro studies only)
• Possible anti-inflammatory effects (evidence: preliminary in vitro studies only)
• Potential antimicrobial properties (evidence: preliminary in vitro studies only)
• Possible anti-tumor activity (evidence: preliminary in vitro studies only)
• No human clinical evidence exists for any health benefits

How It Works

Phellamurin's flavanone glycoside backbone is believed to scavenge reactive oxygen species (ROS) by donating hydrogen atoms to free radicals, potentially inhibiting lipid peroxidation cascades. In vitro data suggest it may suppress pro-inflammatory mediators by downregulating NF-κB signaling and reducing COX-2 expression, thereby limiting prostaglandin E2 production. Its putative anti-tumor activity in cell lines has been loosely associated with induction of caspase-dependent apoptotic pathways, though the specific receptor targets and enzymatic interactions remain uncharacterized in peer-reviewed literature.

Scientific Research

No human clinical trials, randomized controlled trials, or meta-analyses have been conducted on phellamurin. All available research is limited to in vitro or preclinical studies suggesting potential bioactivities.

Clinical Summary

All available evidence for phellamurin is derived exclusively from in vitro (cell-based) studies; no human clinical trials or peer-reviewed animal pharmacokinetic studies specifically isolating phellamurin have been published as of early 2025. Cell culture studies have demonstrated antioxidant, anti-inflammatory, and cytotoxic effects at micromolar concentrations, but these findings cannot be directly extrapolated to human physiology due to unknown oral bioavailability and metabolic fate. The compound is frequently studied as part of Phellodendron amurense whole-extract research, making it difficult to attribute observed effects solely to phellamurin rather than co-occurring compounds like berberine or phellodendrine. The overall evidence base is extremely preliminary, and no efficacious dose or therapeutic endpoint has been established for humans.

Nutritional Profile

Phellamurin is a flavonoid glycoside (specifically a dihydroflavonol glycoside) isolated primarily from Phellodendron amurense (Amur cork tree) bark. It is not a macronutrient source and contains no meaningful protein, fat, carbohydrate, fiber, or caloric value in supplemental or extract form. As a pure compound, it is characterized by its flavanone-glucoside molecular structure (molecular formula C27H32O14, molecular weight approximately 580.5 g/mol). Bioactive profile: Phellamurin belongs to the dihydroflavonol subclass of flavonoids, structurally related to taxifolin (dihydroquercetin) with a glycoside attachment; concentrations in Phellodendron bark extracts vary but phellamurin has been identified at trace-to-minor constituent levels (typically <1–2% of total extract by dry weight in reported phytochemical analyses). No vitamins, dietary minerals, or fiber are inherently associated with this isolated compound. Bioavailability: No human pharmacokinetic data exists; as a glycosylated flavonoid, intestinal absorption would likely require hydrolysis of the glycosidic bond by gut microbiota or intestinal glucosidases prior to uptake of the aglycone, a pattern common to flavonoid glycosides generally. Oral bioavailability is expected to be low and variable based on structural analogs, but no specific human or animal absorption data for phellamurin has been published as of available literature.

Preparation & Dosage

No clinically studied dosage ranges are available as no human clinical trials have been conducted. No standardized forms or recommended doses exist. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Other flavonoids, quercetin, kaempferol, berberine, Phellodendron bark extract

Safety & Interactions

No formal human safety studies, toxicology profiles, or established tolerable upper intake levels exist specifically for isolated phellamurin. Because phellamurin is derived from Phellodendron amurense, caution is warranted when combining it with berberine-containing supplements or medications, as additive effects on cytochrome P450 enzyme activity (particularly CYP3A4 inhibition) are theoretically possible. Pregnant and breastfeeding individuals should avoid phellamurin supplementation due to a complete absence of reproductive safety data, and the parent plant has historically been contraindicated in pregnancy in traditional medicine contexts. Individuals taking anticoagulants, immunosuppressants, or antidiabetic medications should consult a healthcare provider before use given the uncharacterized interaction profile.